<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoles = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 添加角色对话框 -->
      <el-dialog
        title="添加角色"
        :visible.sync="addRoles"
        width="30%"
        @close="addDialogClosed"
      >
        <span>
          <el-form
            :model="addForm"
            :rules="addFormRules"
            ref="addFormRef"
            label-width="80px"
          >
            <el-form-item size="mini" label="角色名称" prop="roleName">
              <el-input v-model="addForm.roleName"></el-input>
            </el-form-item>
            <el-form-item size="mini" label="角色描述" prop="roleDesc">
              <el-input v-model="addForm.roleDesc"></el-input>
            </el-form-item>
          </el-form>
        </span>

        <span slot="footer" class="dialog-footer">
          <el-button size="mini" @click="addRoles = false">取 消</el-button>
          <el-button size="mini" type="primary" @click="addjuese"
            >确 定</el-button
          >
        </span>
      </el-dialog>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['vcenter', 'bdbotton', i1 === 0 ? 'botop' : '']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row
                  :class="['vcenter', i2 === 0 ? '' : 'bdtop']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      :class="[i3 === 0 ? '' : 'bdtop']"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- 摊开获取的数据 -->
            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="editDialogxiugaiAA(scope.row.id)"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="editDialogdelete(scope.row.id)"
              >删除</el-button
            >
            <!-- 分配权限按钮 -->
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogxiugai" width="50%">
      <span>
        <!-- 对话框内容 -->
        <el-form
          :model="roleshuju"
          :rules="roleshujuRules"
          ref="rolesRef"
          label-width="100px"
        >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="roleshuju.roleName" clearable></el-input>
          </el-form-item>
          <el-form-item label="角色描述">
            <el-input v-model="roleshuju.roleDesc" clearable></el-input>
          </el-form-item>
        </el-form>
      </span>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogxiugai = false">取 消</el-button>
        <el-button type="primary" @click="editDialogtijiao">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisble" width="50%"
    @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisble = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisble: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      // 默认选中的节点id值
      defKeys:[],
      // 当前即将分配权限的角色id
      roleId:'',
      // 添加角色对话框的显示隐藏
      addRoles: false,
      // 添加用户的表单数据
      addForm: {
        roleName: '',
        roleDesc: '',
      },
      // 修改的对话框显示隐藏
      editDialogxiugai: false,
      // id查到的角色数据
      roleshuju: {
        roleName: '',
        roleDesc: '',
        roleId: '',
      },
      roleshujuRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur',
          },
        ],
      },
      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [
          {
            required: true,
            message: '请输入角色名',
            trigger: 'blur',
          },
          {
            min: 3,
            max: 10,
            message: '用户名的长度在3~10个字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [
          {
            required: false,
            message: '请输入描述名',
            trigger: 'blur',
          },
          {
            min: 3,
            max: 10,
            message: '用户名的长度在3~10个字符之间',
            trigger: 'blur',
          },
        ],
      },
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('/roles')
      if (res.meta.status != 200) {
        return $message.error('获取角色列表失败')
      }

      this.rolelist = res.data
      //   console.log(this.rolelist)
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 预验证要提交的数据，添加角色
    addjuese() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return
        // 提交添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败')
        this.addForm = res.data
        this.$message.success('添加角色成功')
        this.addRoles = false
        this.getRolesList()
      })
    },
    // 根据id查角色
    async editDialogxiugaiAA(id) {
      this.editDialogxiugai = true
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('查询角色失败')
      this.$message.success('查询角色成功')
      this.roleshuju = res.data
    },
    // 提交修改
    editDialogtijiao() {
      this.$refs.rolesRef.validate(async (valid) => {
        if (!valid) return
        const { data: res } = await this.$http.put(
          'roles/' + this.roleshuju.roleId,
          {
            roleName: this.roleshuju.roleName,
            roleDesc: this.roleshuju.roleDesc,
          }
        )
        if (res.meta.status !== 200) return this.$message.error('更新角色失败')
        this.$message.success('更新角色成功')
        this.editDialogxiugai = false
        this.getRolesList()
      })
    },
    // 删除
    async editDialogdelete(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      // 如果确认删除返回字符串confirm
      // 如果取消删除返回cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.info('删除失败')
      this.$message.success('删除成功')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      // 确定返回confirm 取消返回cancel
      // console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.$message.success('删除权限成功！')
      // 如果重新渲染页面会导致展开行关闭
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }

      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)

      // 递归获取三级节点的id
      this.getLeafKeys(role,this.defKeys)

      this.setRightDialogVisble = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node,arr){
      // 如果当前 node 节点不包含 children属性，则是三级节点
      if(!node.children){
        return arr.push(node.id)
      }

      node.children.forEach(item => 
      this.getLeafKeys(item,arr))
    },
        // 监听分配权限对话框的关闭事件
    async setRightDialogClosed(){
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisble = false
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbotton {
  border-bottom: 1px solid #eee;
}

// 纵向上的flex布局
.vcenter {
  display: flex;
  align-items: center;
}
</style>